has. sort of as only a work wife could. if michelle obama testified to what he's like as the husband, he's testifying to what the president is like as the, quote, work wife, if you will. also, i'm told, wolf, that he'll draw contrasts with romney. as we said earlier, if a gentle way, not a blistering attack. the idea is he can set the stage so president obama can come up and talk about the future. >> on the campaign stump, he has been blistering at times going after mitt romney and the republicans. tonight, will be a softer joe biden. >> that's right, he is usually the attack dog. today, it will focus much more on what he's seen in the white house with the president. >> by all accounts, you cover the white house, you're our chief white house correspondent, they do have an excellent relationship, the president and the vice president. there doesn't seem to be any significant tension. although they disagree on policy from time to time. >> that's right. there are moments -- i think jill biden is coming out, his wife. >> there she is, dr. jill biden, the wife of the vice president.